Phylum Echinodermata: Class Concentricycloidea
Swimming larval stages in sea lilies are:
absent
present
naked
hidden
absent
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Size of preserved xyloplax medusa is nearly:A. 2 cm
B. 2 mm
C. 3 mm
D. 5 mm
Sea lilies lack the:
A. disk
B. tubes
C. arms
D. stalk
Mechanism of reproduction in sea lilies is:
A. parthenogenesis
B. asexual
C. sexual
D. unknown
Sea daisies that have been recently discovered are included in class
A. crinoidea
B. concentricycloidea
C. Holothuroidea
D. asteroidea
Number of brood pouches that hold embryo during development is:
A. 2 pairs
B. 3 pairs
C. 5 pairs
D. 1 pair
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